Valve control with indicator

Claim 1

In a valve control device having: (a) a cylindrical housing which housing includes an axial bore therethrough, a first fluid entry port, a second fluid entry port, a first fluid exit port, an exhaust port, all such ports being in communication with said axial bore; (b) a slide valve member extending substantially through said axial bore and movable between a first position permitting fluid communication between said first fluid entry port and said first fluid exit port to a second position blocking fluid communication between said first fluid entry port and said first fluid exit port; (c) means preventing fluid pressure entering said second fluid entry port from moving said slide valve member from said second position to said first position; and (d) manually operable means for moving said slide valve member from said second position to said first position, the improvement comprising: (a) an axial fluid passageway extending substantially through the length of said slide valve member; b. combination upper lateral fluid passageway and detent pin receiving means through said slide valve member communicating between said axial bore and the exterior of said slide valve member; c. detent housing laterally extending from said housing; d. detent member laterally movable within said detent housing, said detent member having a pin portion depending therefrom; e. detent pin passageway laterally extending through a wall of said cylindrical housing in communication with said combination passageway and receiving means only when said slide valve member is in said first position, whereby on said slide valve member being manually moved from said second to said first position, and said detent pin being caused to extend within said combination passageway and receiving means, fluid pressure from said second fluid entry port may cause extraction of said detent pin from said combination passageway and receiving means.